Unlockables

Huckebein Mk.III R

Make sure Retzal has at least 35 kills by the end of stage 18. Make sure Leona, Bullet, Rio, Ryoto, Task and Kushua have a combined total of at least 185 levels by the end of stage 33. Get the skill point on stage 30.

Lamia's Secret Robots

For both of these, make sure Lamia moves onto the square Echidna retreated on during stage 10/13 (depending on which path you took) and that she has a total of 55 kills before the end of stage 24. She will join you with one of them on stage 28.

Unlockable

How to Unlock

Ash Saver

Make sure Lamia has 2 (and only 2) battle encounters with Axel on stage 19.

Vysaga

You only get the Vysaga if you are playing on a New Game+. To get it, make sure Lamia has only 1 battle encounter with Axel on stage 19.